Pressure gauge



Sept. 25 ,1923.

H; BACHARACH PRESSURE GAUGE Filed Jan. 5, 1921 Fll..

IIIIIII #91u51 FIEJ..

Patented Sept. 25, 1923.

l .Urrea sT-A TE S l HERMAN BACHARACH, 0F PITTSBURGH, PENNSYLVANIA, AssIG'N'on 'roBAc'HAR'Ac INDUSTRIAL INSTRUMENT COMPANY, A conPonAfrIoN. `or* PENNSYLVANIA.

PRESSURIE GAUGE.

:Application filedV January 5, 1921. semina. 435310.

j. Bei it known that I, HERMAN VBACHA- BACH,V a citizen of the United States, and Ya resident of Pittsburgh, in the county of Aillegheny. and State Vof lennsylva'nia,v have made anew and usefullnif'entionin Pres sure Gauges, of whichthe following is av specification. l

The-invention relates topressure gauges;

thas for itsfprincipal objectsthe pro- `vision of an improve'dand simplified con struction; (l) in which the casing may be made in the ormofa singlecasting; (2) `in which the gauge glass is protectedby the casing;

tions between the; glass and the pressure (.3) which requiresl no cross connecchamber; which permits a: readyadjustment of the level Vof the liquid in ,the-

. gauge gjand (5.) which. involves theV foregoing advantages in a construction in which the zero point'ofthe glass 1s visible. The Y gauge hasthef'further advantages ofA cornpactness and good appearance. Certain em-V bodiments of the invention are illustrated inthe .accompanying drawings whereinfa4 Figure 1 is a vertical section through fthe- Fig. 2 is a similar section taken at.v rightiangles tothe se'ction"of:` Fig. 1. F ig.,

gauge.

3 is a bottom plan `view with the closure cap removed. Fig. 4 is a'transverseV sectionA on the. line IV--IV of Fig. 2., And Fig. 5 is a front elevation of ,a modifiediconstruction.

In the preferred embodiment,` the gau e is made in the form of a U-shaped casting, ol-` low at its lower end and with the gauge glass fitting in the concaveportion withitslower end extended into the U-shaped cavity containing the 'liquid employed forL indicating the pressure, as a. one piece casing is'simple and less expensive than one made in several parts, but if desired, the casino' may be made up of cast and pressed sections fitted together to provide Va casing of substantially the same shape as the cast casing. A portion of the top of the U-shaped chamber into which the gauge glass extends is depressed so that the level of the liquid in the Vchamber lies above the top of the chamber thus eX-V posing to view the zero point on the gauge. This arrangement is advantageous since the `gauge glass; is protected by the U-shaped casing while at the same time preserving the advantage Vof an arrangement wherein theV zero point is visible and cross connections are avoided since the glass has its ender-V desired toV V takereadings below` Althe (zeroAV pointlaswell. as jabove it,a1 fornirci casing is employed in-l which the :hollow chambercolf abovesuch zerofpointand in sOme'instaneS,

the Vfull-length oi'thegauge.A Y -1 betermed the scale Wall since it 'carriesthe receptacle is l depressed as indicated at iet andk perforated toV receive the vgaugeV glass.f- ;The gauge. glass extends through thek Yperfo?- ratigon'in thewall (at atfitsilower end and Vat itsuppere'nd is receivedby aperforation.' in the .part 6.0i the scalev wall, suitablefpaclring 7 and 8 beingprovided around the'glass Where'itgpasses through-the metal,v Acoupling 9 isprovidediat the upper end Offthe; Y

casing-lbymeans of'which afconnectionniayy -tacle 3 '.,isclosedbyrneansf` the plateflOyA bei made-Withaiheadd pire VThe:rellen held, in place by; the screws 2151.;

be Vni-ade.frornauy side,-Fi`g; ;2 showingv the The gaugeiV is preferably;.rconstructedjlso.; thatthegconnection to the receptacle 23` may f A 85' connectionlll:` at the rear side of the recepj tacle, thef openingsat the s'ides `being closed by the screw plugs 12 and 13. .Although not A required in the simpler forms of c0nstruc'5-'- y tion the'device'illustratedin Fig. 2 maybe employed forfclosingthe inletY tothe cham- -j f' Vber whenthe device isb'eing' carried about.

This device is particularly useful when'emv ployed in a physicians gauge or anengi neers testing outfit, which must be carried from place to place and may be turned Yin transportation tovariouspositions. When so used,a screw cap `is of Vcoursefrequired"to close the coupling 9 at the upper end ofthe 'Y gauge.- The device referred to vcomprises avalvemember 15 seatingin thefend of. the

passage 16 and having laV threaded 'stem '17 extendingy through they bottom plate' 10 and Q suitably packed by a stuiing box device 18.l lWhenscrewed to the position VillustratedV the passa'gewl is closed so that any escape of liquid'from the chamber Vis zwoided;V The' f member 15 also Vservestheadditional unc 1 tion `as a device lfor lregulating the level of" the liquid chamber, y As the rnemloer` 15 is moved downward it displaces more and more liquid Vthus raising the'level of the liquid. The level may thuskv be brought to the exact 1zero point when it becomes necessay to use this device. ,Y Y

' Fig. aillustrates a modified construction in which the upper and lower portions 19 and 20 may be made of castings 1with an intermediate portion 21 of pressed metal,

the U-shaped receptacle in this case, extending the fullV length of, the gaugewith the Zero pointat Lthe middle of the gauge, soV that-readings may be takenan equal distance' in both directions.'- A varietyrof other 'ar-A rangements l'night be made depending upon conditions Yto be met, the primary requirement being, however, the use of the U-shaped casing or receptacle having a depressed portion tofreceivethe.endfofthe gauge glass so that the zero point of thev liquid isY visible above the depressed portion. f

The advantagesof the'device Ywill be ap-Y parent to yth'osefskilled in the art.v Aside fromv the eompactness andappearance of t-he device, the advantages of simplicity and low cost of construction are combinedwith those ot'safety and the -possibilityrof seeing the zero point of the glass without the necessity Y of cross connections such as are required `whenthe glass is seatedagainst the front of a vertical tube or chamber such as that employed with the ordinary'gauge-The glass is lprotected inV the cavity ofthecasing and the costreduced to a minimumY because of 'the' simplicity o making the connection with the receptacle incident to merely extending the glass through the toproi1 the chamber and packing it at Y such point. f Y *l level thereof upwardly whenA moved downthe plate.

I'Vhat VI claim is: f if K 1. In combination in ai gauge, a receptacle for an indicating liquid, a gauge glass connected thereto, a displacement member in the chamber, a stem 'for said member extending i through the bottom wall oit the receptaclev Y and provided with operating means exterior of the receptacle, and means for preventing 'a leakage of liquid along Vthe stem.

2. In combination in a gauge, a receptacle i for an indicatino` liquidhaving an inlet'pasf sage above thej level of the liquid provided with a valve. seat, a gauge glass connected to the receptacle, and vertically movable combined'valve and displacement memberfV having a threaded adjusting stem operable'Y from the exteriory of the receptacle. and adapted to close the; inlet passage when moved toits-'uppermost position, and to displace liquidin the receptacle and adjust theY In testimony whereof I havehereunto sub-`V seribedmy name thisrd dayof Jans, 19,21.

ff i-riiimvrnirV Bncnanxcug 

